Cutting tool for machining metallic materials

摘要

A cutting tool for metal material processing has a hard metal body and a multi-layer coating applied to the hard metal body in at least one surface area. The multi-layer coating includes the following, sequentially in direction from the hard metal body to the surface of the cutting tool: at least one layer TiCx1Ny1, where x1+y1=1, x1≧0, y1>0; at least one layer TiCx2Ny2Oz2, where x2+y2+z2=1, 0≦z2≦0.03 and 0.5≦x2≦0.85; at least one layer TiN, or TiCx31Ny31, where 0.2≦x31≦0.8 and x31+y31=1, or TiNy32Bv32, where 0.0001≦v32≦0.05 and y32+v32=1; at least one layer: TiNy41Bv41Oz41, where y41+v41+z41=1 and 0.0001≦v41≦0.05 and 0.01≦z41≦0.6, or TiCx42Ny42Oz42, where x42+y42+z42=1 and 0≦y42≦0.5 and 0.01≦z42≦0.6; and at least one outer layer κ-Al2O3. The at least one layer TiCx2Ny2Oz2 has a texture in the direction having a texture coefficient TC(311)=1.3.

主权项

1. A cutting tool for machining metallic materials, comprising:
a hard metal body and a multilayer coating applied to said hard metal body in at least one surface region thereof; said multilayer coating comprising the following layers in a direction from said hard metal body to a surface of the cutting tool: at least one layer TiCx1Ny1, where x1+y1=1, x1≧0, y1>0; at least one layer TiCx2Ny2Oz2, where x2+y2+z2=1, 0≦z2≦0.03 and 0.5≦x2≦0.85, said at least one layer TiCx2Ny2Oz2 having a texturing in a (311) direction with a texture coefficient TC(311)≧1.3 and comprising plate-like, columnar crystals, wherein 0.01≦z2≦0.02; at least one layer: TiN, or TiCx31Ny31, where 0.2≦x31≦0.8 and x31+y31=1, or TiNy32Bv32, where 0.0001≦v32≦0.05 and y32+v32=1; at least one layer: TiNy41Bv41Oz41, where y41+v41+z41=1 and 0.0001≦v41≦0.05 and 0.01≦z41≦0.6, or TiCx42Ny42Oz42, where x42+y42+z42=1 and 0≦y42≦0.5 and 0.01 ≦z42≦0.6; and at least one outer layer κ-Al2O3.